Patent application number | Description | Published |
20100223920 | ENGINE HAVING OXYGEN PUMPING INTAKE SYSTEM AND METHOD OF REMOVING OXYGEN FROM INTAKE AIR FLOW - An engine assembly may include a voltage source and an oxygen pump assembly. The oxygen pump assembly may include an intake conduit and an oxygen pumping mechanism. The intake conduit may be in fluid communication with an air supply and an intake manifold. The oxygen pumping mechanism may include an oxygen ion conducting cell, a first electrode in electrical communication with the voltage source and a second electrode in electrical communication with the voltage source. The first electrode may be disposed on a first side of the cell and may be exposed to an interior of the intake conduit. The second electrode may be disposed on a second side of the cell and isolated from the interior of the conduit. The oxygen pumping mechanism may remove oxygen from an air flow within the interior of the intake conduit based on a voltage applied across the cell by the voltage source. | 09-09-2010 |
20110016862 | SYSTEM AND METHOD FOR CONTROLLING A TWO-STAGE SERIES SEQUENTIAL TURBOCHARGER USING BYPASS VALVE LEAKAGE CONTROL - A method of controlling a turbocharger for an engine and a control system for the same includes a variable nozzle turbine control module operating a variable nozzle turbine of a high pressure turbocharger closed loop in a first load-engine speed region. The system also includes a high pressure turbine bypass valve control module operating a high pressure turbine bypass valve in a closed position in a first load-engine speed region. The variable nozzle turbine control module operates a variable nozzle turbine closed loop in a second load-engine speed region between the first load-speed region and a third load speed region. The high pressure turbine bypass valve module operates the high pressure turbine bypass valve in a transient region in the second load-engine speed region. The variable nozzle turbine control module operates the variable nozzle turbine open loop. The high pressure turbine bypass valve control module operates a high pressure turbine bypass valve in an open position in a third load-engine speed region. | 01-27-2011 |
20110226216 | IDLE SPEED REDUCTION SYSTEMS AND METHODS - An idle control system for a vehicle comprises an actuator control module, a torque determination module, a deviation analysis module, and an idle speed reduction module. The actuator control module regulates an engine speed based on a desired idle speed when an engine idle mode is enabled. The torque determination module determines actual torques for a cylinder of an engine while the engine idle mode is enabled. The deviation analysis module determines a standard deviation based on more than one of the actual torques while the engine idle mode is enabled. The idle speed reduction module determines an idle speed reduction based on the standard deviation and decreases the desired idle speed based on the idle speed reduction. | 09-22-2011 |
20110239984 | METHOD AND SYSTEM FOR ENABLING CYLINDER BALANCING AT LOW IDLE SPEED USING CRANKSHAFT SPEED SENSOR - A method and control system for controlling the idle speed of an engine includes an engine speed module that generates an engine speed signal. The control system also includes an actuator control module that regulates an engine speed based on a desired idle speed when an engine idle mode is enabled and a balancing module that balances torque produced by cylinders of an engine based on the engine speed signal when the engine idle mode is enabled. The control module also includes an idle speed reduction module that determines an idle speed reduction based on the actual torques produced by the cylinders after the balancing module balances the torque and that decreases the desired idle speed based on the idle speed reduction. | 10-06-2011 |
20110257867 | METHOD AND SYSTEM FOR REDUCING TURBO LAG IN AN ENGINE - A method and control module for controlling an engine includes a requested torque module that generates a requested torque and a turbo boost level module that determines a desired boost level based on the driver requested torque. The control module further includes a pulse determination module that determines a primary fuel injection pulsewidth and a secondary fuel injection pulsewidth based on the driver requested torque and the desired boost level and controls a first injection into the cylinder with the primary fuel injection pulsewidth and a second injection into the cylinder with the secondary fuel injection pulsewidth. | 10-20-2011 |
20120247439 | SYSTEMS AND METHODS FOR CONTROLLING ENGINE COMBUSTION STABILITY - A control system for an engine includes first and second modules. The first module determines an oxygen concentration within an intake manifold of the engine. The second module regulates a flow of exhaust gas recirculation (EGR) into the intake manifold based on the determined oxygen concentration. In a homogeneous charge compression ignition (HCCI) engine, the second module may also disable an HCCI combustion mode of the HCCI engine based on the oxygen concentration. | 10-04-2012 |
20130073179 | SELECTIVE EXHAUST GAS RECIRCULATION DIAGNOSTIC SYSTEMS AND METHODS - A system for a vehicle includes a first exhaust gas flow rate (EGF) estimation module, a second EGF estimation module, and an EGF fault detection module. The first EGF estimation module estimates a first flow rate of exhaust re-circulated back to an intake manifold based on a concentration of oxygen in the intake manifold. The second EGF estimation module estimates a second flow rate of exhaust re-circulated back to the intake manifold based on an engine speed and an engine load. The EGF fault detection module selectively indicates a fault is present in an exhaust gas recirculation (EGR) system based on the first flow rate and the second flow rate. | 03-21-2013 |
20130268176 | EXHAUST GAS RECIRCULATION CONTROL SYSTEMS AND METHODS FOR LOW ENGINE DELTA PRESSURE CONDITIONS - A partial pressure determination module: determines a first partial pressure of oxygen in an intake manifold of an engine based on an output of a first oxygen sensor measuring oxygen in the intake manifold; and determines a second partial pressure of oxygen in an exhaust system based on an output of a second oxygen sensor measuring oxygen in the exhaust system. A concentration determination module: determines a concentration of oxygen in the intake manifold based on the first partial pressure and an intake manifold; and determines a concentration of oxygen in the exhaust system based on the second partial pressure. A flowrate determination module determines a mass flowrate of exhaust gas recirculation (EGR) based on the concentration of oxygen in the intake manifold and the concentration of oxygen in the exhaust system. An actuator control module controls an engine operating parameter based on the mass flowrate of EGR. | 10-10-2013 |
20130332050 | HUMIDITY DETERMINATION AND COMPENSATION SYSTEMS AND METHODS USING AN INTAKE OXYGEN SENSOR - An engine control system for a vehicle includes an oxygen mass flow rate module, an oxygen per cylinder module, and a fuel control module. The oxygen mass flow rate module generates a mass flow rate of oxygen flowing into an engine based on a mass air flow rate (MAF) into the engine and a percentage of oxygen by volume measured using an intake oxygen (IO) sensor in an intake system. The oxygen per cylinder module generates a mass of oxygen for a combustion event of a cylinder of the engine based on the mass flow rate of oxygen flowing into the engine. The fuel control module controls fueling to the cylinder for the combustion event based on the mass of oxygen. | 12-12-2013 |
20140076279 | AIRFLOW CONTROL SYSTEMS AND METHODS - An engine control system for a vehicle, includes a delay and rate limit module, a throttle control module, a phaser control module, and an exhaust gas recirculation (EGR) control module. The delay and rate limit module applies a delay and a rate limit to a first torque request to produce a second torque request. The throttle control module determines a target throttle opening based on the second torque request and selectively adjusts a throttle valve based on the target throttle opening. The phaser control module determines target intake and exhaust phasing values based on the second torque request and selectively adjusts intake and exhaust valve phasers based on the target intake and exhaust phasing values, respectively. The EGR control module determines a target EGR opening based on the first torque request and selectively adjusts an EGR valve based on the target EGR opening. | 03-20-2014 |
20140150759 | Engine Including External EGR System - An engine assembly includes an engine structure defining a combustion chamber. An intake system includes an intake manifold in communication with the combustion chamber. An exhaust system includes an exhaust conduit in communication with the combustion chamber. An exhaust gas recirculation system includes an EGR tube providing communication between the intake and exhaust systems, the EGR tube includes an end portion extending a distance into the intake system in a direction opposing air flow to the intake manifold. | 06-05-2014 |
20140372009 | INTAKE TEMPERATURE CONTROL SYSTEMS AND METHODS FOR INTAKE MANIFOLD PROTECTION - An engine control system of a vehicle includes a first temperature module, a second temperature module, and an exhaust gas recirculation (EGR) control module. The first temperature module determines a temperature of gas within an intake manifold of an engine. The second temperature module determines a temperature of an EGR conduit that is coupled to the intake manifold. The EGR control module reduces opening of an EGR valve when the temperature of the gas and the temperature of the conduit is greater than a predetermined temperature. | 12-18-2014 |
20150047424 | STATIC AND DYNAMIC PRESSURE COMPENSATION FOR INTAKE OXYGEN SENSING - An oxygen sensor pressure compensation system includes a static pressure compensation module to receive an oxygen sensor signal from an oxygen sensor and a pressure signal from a pressure sensor and to perform static pressure compensation. A dynamic pressure compensation module receives the oxygen sensor signal and the pressure signal and to perform dynamic pressure compensation. A summing module generates a compensated oxygen signal based on the static pressure compensation and the dynamic pressure compensation. | 02-19-2015 |
20150051811 | SENSOR BASED MEASUREMENT AND PURGE CONTROL OF FUEL VAPORS IN INTERNAL COMBUSTION ENGINES - A fuel control system for a vehicle includes a pressure compensation module that compensates an intake oxygen signal based on an intake pressure signal and that generates a compensated intake oxygen signal. A blow-by estimation module generates an estimated blow-by flow. A purge flow estimation module estimates the purge flow based on the compensated intake oxygen signal and the estimated blow-by flow. A fuel control estimation module reduces fueling to injectors of an engine of the vehicle based on the purge flow. | 02-19-2015 |